Achild on a spinning playground ride is 0.36 m from the center of the ride. the centripetal force on the child is 19 n.

what is the mass of the child if the child has a tangential speed of 0.54 m/s?

3.7 kg
13 kg
23 kg
79 kg

Answer : The mass of the child is, 23 kg.

Solution :

Formula used for centripetal force is,

where,

= centripetal force  = 19 N

m = mass of an object = ?

r = radius of path  = 0.36 m

v = velocity or tangential speed of an object  = 0.54 m/s

Now put all the given values in the above formula, we get the mass.

Therefore, the mass of the child is, 23 kg.